North Korea accused the U.S. of "militarizing" space, which could become a "potential nuclear war field."

President Trump has shared his desire for a defense system like Israel's Iron Dome and requested funding for it during his joint address to Congress in March.

China has similarly expressed strong concerns about Washington's Golden Dome plan, accusing the United States of undermining global stability.

North Korea has detained shipyard officials responsible for a recent major accident during the launch of a new warship, state media said on Sunday. The failed launch that crippled the 5,000-ton warship was witnessed by leader Kim Jong Un who said the accident damaged the country's dignity and vowed to punish those found responsible.